JinxRyu/ARMeilleure/Translation/PTC/Ptc.cs
LDj3SNuD 68f6b79fd3
Add a simple Pools Limiter. (#1830)
* Added support for offline invalidation, via PPTC, of low cq translations replaced by high cq translations; both on a single run and between runs.

Added invalidation of .cache files in the event of reuse on a different user operating system.

Added .info and .cache files invalidation in case of a failed stream decompression.

Nits.

* InternalVersion = 1712;

* Nits.

* Address comment.

* Get rid of BinaryFormatter.

Nits.

* Move Ptc.LoadTranslations().

Nits.

* Nits.

* Fixed corner cases (in case backup copies have to be used). Added save logs.

* Not core fixes.

* Complement to the previous commit. Added load logs. Removed BinaryFormatter leftovers.

* Add LoadTranslations log.

* Nits.

* Removed the search and management of LowCq overlapping functions.

* Final increment of .info and .cache flags.

* Nit.

* Free up memory allocated by Pools during any PPTC translations at boot time.

* Nit due to rebase.

* Add a simple Pools Limiter.

* Nits.

* Fix missing JumpTable.RegisterFunction() due to rebase.

Clear MemoryStreams as soon as possible, when they are no longer needed.

* Code cleaning.

* Nit for retrigger Checks.

* Update Ptc.cs

* Contextual refactoring of Translator. Ignore resetting of pools for DirectCallStubs.

* Nit for retrigger Checks.
2021-01-12 19:04:02 +01:00

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29 KiB
C#

using ARMeilleure.CodeGen;
using ARMeilleure.CodeGen.Unwinding;
using ARMeilleure.CodeGen.X86;
using ARMeilleure.Memory;
using ARMeilleure.Translation.Cache;
using Ryujinx.Common.Configuration;
using Ryujinx.Common.Logging;
using System;
using System.Buffers.Binary;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.IO.Compression;
using System.Runtime.InteropServices;
using System.Security.Cryptography;
using System.Threading;
namespace ARMeilleure.Translation.PTC
{
public static class Ptc
{
private const string HeaderMagic = "PTChd";
private const int InternalVersion = 1817; //! To be incremented manually for each change to the ARMeilleure project.
private const string ActualDir = "0";
private const string BackupDir = "1";
private const string TitleIdTextDefault = "0000000000000000";
private const string DisplayVersionDefault = "0";
internal const int PageTablePointerIndex = -1; // Must be a negative value.
internal const int JumpPointerIndex = -2; // Must be a negative value.
internal const int DynamicPointerIndex = -3; // Must be a negative value.
private const byte FillingByte = 0x00;
private const CompressionLevel SaveCompressionLevel = CompressionLevel.Fastest;
private static readonly MemoryStream _infosStream;
private static readonly MemoryStream _codesStream;
private static readonly MemoryStream _relocsStream;
private static readonly MemoryStream _unwindInfosStream;
private static readonly BinaryWriter _infosWriter;
private static readonly ManualResetEvent _waitEvent;
private static readonly AutoResetEvent _loggerEvent;
private static readonly object _lock;
private static bool _disposed;
private static volatile int _translateCount;
internal static PtcJumpTable PtcJumpTable { get; private set; }
internal static string TitleIdText { get; private set; }
internal static string DisplayVersion { get; private set; }
internal static string CachePathActual { get; private set; }
internal static string CachePathBackup { get; private set; }
internal static PtcState State { get; private set; }
static Ptc()
{
_infosStream = new MemoryStream();
_codesStream = new MemoryStream();
_relocsStream = new MemoryStream();
_unwindInfosStream = new MemoryStream();
_infosWriter = new BinaryWriter(_infosStream, EncodingCache.UTF8NoBOM, true);
_waitEvent = new ManualResetEvent(true);
_loggerEvent = new AutoResetEvent(false);
_lock = new object();
_disposed = false;
PtcJumpTable = new PtcJumpTable();
TitleIdText = TitleIdTextDefault;
DisplayVersion = DisplayVersionDefault;
CachePathActual = string.Empty;
CachePathBackup = string.Empty;
Disable();
}
public static void Initialize(string titleIdText, string displayVersion, bool enabled)
{
Wait();
ClearMemoryStreams();
PtcJumpTable.Clear();
PtcProfiler.Wait();
PtcProfiler.ClearEntries();
if (String.IsNullOrEmpty(titleIdText) || titleIdText == TitleIdTextDefault)
{
TitleIdText = TitleIdTextDefault;
DisplayVersion = DisplayVersionDefault;
CachePathActual = string.Empty;
CachePathBackup = string.Empty;
Disable();
return;
}
Logger.Info?.Print(LogClass.Ptc, $"Initializing Profiled Persistent Translation Cache (enabled: {enabled}).");
TitleIdText = titleIdText;
DisplayVersion = !String.IsNullOrEmpty(displayVersion) ? displayVersion : DisplayVersionDefault;
if (enabled)
{
string workPathActual = Path.Combine(AppDataManager.GamesDirPath, TitleIdText, "cache", "cpu", ActualDir);
string workPathBackup = Path.Combine(AppDataManager.GamesDirPath, TitleIdText, "cache", "cpu", BackupDir);
if (!Directory.Exists(workPathActual))
{
Directory.CreateDirectory(workPathActual);
}
if (!Directory.Exists(workPathBackup))
{
Directory.CreateDirectory(workPathBackup);
}
CachePathActual = Path.Combine(workPathActual, DisplayVersion);
CachePathBackup = Path.Combine(workPathBackup, DisplayVersion);
Enable();
PreLoad();
PtcProfiler.PreLoad();
}
else
{
CachePathActual = string.Empty;
CachePathBackup = string.Empty;
Disable();
}
}
internal static void ClearMemoryStreams()
{
_infosStream.SetLength(0L);
_codesStream.SetLength(0L);
_relocsStream.SetLength(0L);
_unwindInfosStream.SetLength(0L);
}
private static void PreLoad()
{
string fileNameActual = String.Concat(CachePathActual, ".cache");
string fileNameBackup = String.Concat(CachePathBackup, ".cache");
FileInfo fileInfoActual = new FileInfo(fileNameActual);
FileInfo fileInfoBackup = new FileInfo(fileNameBackup);
if (fileInfoActual.Exists && fileInfoActual.Length != 0L)
{
if (!Load(fileNameActual, false))
{
if (fileInfoBackup.Exists && fileInfoBackup.Length != 0L)
{
Load(fileNameBackup, true);
}
}
}
else if (fileInfoBackup.Exists && fileInfoBackup.Length != 0L)
{
Load(fileNameBackup, true);
}
}
private static bool Load(string fileName, bool isBackup)
{
using (FileStream compressedStream = new FileStream(fileName, FileMode.Open))
using (DeflateStream deflateStream = new DeflateStream(compressedStream, CompressionMode.Decompress, true))
using (MemoryStream stream = new MemoryStream())
using (MD5 md5 = MD5.Create())
{
int hashSize = md5.HashSize / 8;
try
{
deflateStream.CopyTo(stream);
}
catch
{
InvalidateCompressedStream(compressedStream);
return false;
}
stream.Seek(0L, SeekOrigin.Begin);
byte[] currentHash = new byte[hashSize];
stream.Read(currentHash, 0, hashSize);
byte[] expectedHash = md5.ComputeHash(stream);
if (!CompareHash(currentHash, expectedHash))
{
InvalidateCompressedStream(compressedStream);
return false;
}
stream.Seek((long)hashSize, SeekOrigin.Begin);
Header header = ReadHeader(stream);
if (header.Magic != HeaderMagic)
{
InvalidateCompressedStream(compressedStream);
return false;
}
if (header.CacheFileVersion != InternalVersion)
{
InvalidateCompressedStream(compressedStream);
return false;
}
if (header.FeatureInfo != GetFeatureInfo())
{
InvalidateCompressedStream(compressedStream);
return false;
}
if (header.OSPlatform != GetOSPlatform())
{
InvalidateCompressedStream(compressedStream);
return false;
}
if (header.InfosLen % InfoEntry.Stride != 0)
{
InvalidateCompressedStream(compressedStream);
return false;
}
byte[] infosBuf = new byte[header.InfosLen];
byte[] codesBuf = new byte[header.CodesLen];
byte[] relocsBuf = new byte[header.RelocsLen];
byte[] unwindInfosBuf = new byte[header.UnwindInfosLen];
stream.Read(infosBuf, 0, header.InfosLen);
stream.Read(codesBuf, 0, header.CodesLen);
stream.Read(relocsBuf, 0, header.RelocsLen);
stream.Read(unwindInfosBuf, 0, header.UnwindInfosLen);
try
{
PtcJumpTable = PtcJumpTable.Deserialize(stream);
}
catch
{
PtcJumpTable = new PtcJumpTable();
InvalidateCompressedStream(compressedStream);
return false;
}
_infosStream.Write(infosBuf, 0, header.InfosLen);
_codesStream.Write(codesBuf, 0, header.CodesLen);
_relocsStream.Write(relocsBuf, 0, header.RelocsLen);
_unwindInfosStream.Write(unwindInfosBuf, 0, header.UnwindInfosLen);
}
long fileSize = new FileInfo(fileName).Length;
Logger.Info?.Print(LogClass.Ptc, $"{(isBackup ? "Loaded Backup Translation Cache" : "Loaded Translation Cache")} (size: {fileSize} bytes, translated functions: {GetInfosEntriesCount()}).");
return true;
}
private static bool CompareHash(ReadOnlySpan<byte> currentHash, ReadOnlySpan<byte> expectedHash)
{
return currentHash.SequenceEqual(expectedHash);
}
private static Header ReadHeader(MemoryStream stream)
{
using (BinaryReader headerReader = new BinaryReader(stream, EncodingCache.UTF8NoBOM, true))
{
Header header = new Header();
header.Magic = headerReader.ReadString();
header.CacheFileVersion = headerReader.ReadUInt32();
header.FeatureInfo = headerReader.ReadUInt64();
header.OSPlatform = headerReader.ReadUInt32();
header.InfosLen = headerReader.ReadInt32();
header.CodesLen = headerReader.ReadInt32();
header.RelocsLen = headerReader.ReadInt32();
header.UnwindInfosLen = headerReader.ReadInt32();
return header;
}
}
private static void InvalidateCompressedStream(FileStream compressedStream)
{
compressedStream.SetLength(0L);
}
private static void PreSave(object state)
{
_waitEvent.Reset();
string fileNameActual = String.Concat(CachePathActual, ".cache");
string fileNameBackup = String.Concat(CachePathBackup, ".cache");
FileInfo fileInfoActual = new FileInfo(fileNameActual);
if (fileInfoActual.Exists && fileInfoActual.Length != 0L)
{
File.Copy(fileNameActual, fileNameBackup, true);
}
Save(fileNameActual);
_waitEvent.Set();
}
private static void Save(string fileName)
{
int translatedFuncsCount;
using (MemoryStream stream = new MemoryStream())
using (MD5 md5 = MD5.Create())
{
int hashSize = md5.HashSize / 8;
stream.Seek((long)hashSize, SeekOrigin.Begin);
WriteHeader(stream);
_infosStream.WriteTo(stream);
_codesStream.WriteTo(stream);
_relocsStream.WriteTo(stream);
_unwindInfosStream.WriteTo(stream);
PtcJumpTable.Serialize(stream, PtcJumpTable);
translatedFuncsCount = GetInfosEntriesCount();
ClearMemoryStreams();
PtcJumpTable.Clear();
stream.Seek((long)hashSize, SeekOrigin.Begin);
byte[] hash = md5.ComputeHash(stream);
stream.Seek(0L, SeekOrigin.Begin);
stream.Write(hash, 0, hashSize);
using (FileStream compressedStream = new FileStream(fileName, FileMode.OpenOrCreate))
using (DeflateStream deflateStream = new DeflateStream(compressedStream, SaveCompressionLevel, true))
{
try
{
stream.WriteTo(deflateStream);
}
catch
{
compressedStream.Position = 0L;
}
if (compressedStream.Position < compressedStream.Length)
{
compressedStream.SetLength(compressedStream.Position);
}
}
}
long fileSize = new FileInfo(fileName).Length;
Logger.Info?.Print(LogClass.Ptc, $"Saved Translation Cache (size: {fileSize} bytes, translated functions: {translatedFuncsCount}).");
}
private static void WriteHeader(MemoryStream stream)
{
using (BinaryWriter headerWriter = new BinaryWriter(stream, EncodingCache.UTF8NoBOM, true))
{
headerWriter.Write((string)HeaderMagic); // Header.Magic
headerWriter.Write((uint)InternalVersion); // Header.CacheFileVersion
headerWriter.Write((ulong)GetFeatureInfo()); // Header.FeatureInfo
headerWriter.Write((uint)GetOSPlatform()); // Header.OSPlatform
headerWriter.Write((int)_infosStream.Length); // Header.InfosLen
headerWriter.Write((int)_codesStream.Length); // Header.CodesLen
headerWriter.Write((int)_relocsStream.Length); // Header.RelocsLen
headerWriter.Write((int)_unwindInfosStream.Length); // Header.UnwindInfosLen
}
}
internal static void LoadTranslations(ConcurrentDictionary<ulong, TranslatedFunction> funcs, IMemoryManager memory, JumpTable jumpTable)
{
if ((int)_infosStream.Length == 0 ||
(int)_codesStream.Length == 0 ||
(int)_relocsStream.Length == 0 ||
(int)_unwindInfosStream.Length == 0)
{
return;
}
Debug.Assert(funcs.Count == 0);
_infosStream.Seek(0L, SeekOrigin.Begin);
_codesStream.Seek(0L, SeekOrigin.Begin);
_relocsStream.Seek(0L, SeekOrigin.Begin);
_unwindInfosStream.Seek(0L, SeekOrigin.Begin);
using (BinaryReader infosReader = new BinaryReader(_infosStream, EncodingCache.UTF8NoBOM, true))
using (BinaryReader codesReader = new BinaryReader(_codesStream, EncodingCache.UTF8NoBOM, true))
using (BinaryReader relocsReader = new BinaryReader(_relocsStream, EncodingCache.UTF8NoBOM, true))
using (BinaryReader unwindInfosReader = new BinaryReader(_unwindInfosStream, EncodingCache.UTF8NoBOM, true))
{
for (int i = 0; i < GetInfosEntriesCount(); i++)
{
InfoEntry infoEntry = ReadInfo(infosReader);
if (infoEntry.Stubbed)
{
SkipCode(infoEntry.CodeLen);
SkipReloc(infoEntry.RelocEntriesCount);
SkipUnwindInfo(unwindInfosReader);
}
else if (infoEntry.HighCq || !PtcProfiler.ProfiledFuncs.TryGetValue(infoEntry.Address, out var value) || !value.highCq)
{
byte[] code = ReadCode(codesReader, infoEntry.CodeLen);
if (infoEntry.RelocEntriesCount != 0)
{
RelocEntry[] relocEntries = GetRelocEntries(relocsReader, infoEntry.RelocEntriesCount);
PatchCode(code, relocEntries, memory.PageTablePointer, jumpTable);
}
UnwindInfo unwindInfo = ReadUnwindInfo(unwindInfosReader);
TranslatedFunction func = FastTranslate(code, infoEntry.GuestSize, unwindInfo, infoEntry.HighCq);
bool isAddressUnique = funcs.TryAdd(infoEntry.Address, func);
Debug.Assert(isAddressUnique, $"The address 0x{infoEntry.Address:X16} is not unique.");
}
else
{
infoEntry.Stubbed = true;
UpdateInfo(infoEntry);
StubCode(infoEntry.CodeLen);
StubReloc(infoEntry.RelocEntriesCount);
StubUnwindInfo(unwindInfosReader);
}
}
}
if (_infosStream.Position < _infosStream.Length ||
_codesStream.Position < _codesStream.Length ||
_relocsStream.Position < _relocsStream.Length ||
_unwindInfosStream.Position < _unwindInfosStream.Length)
{
throw new Exception("Could not reach the end of one or more memory streams.");
}
jumpTable.Initialize(PtcJumpTable, funcs);
PtcJumpTable.WriteJumpTable(jumpTable, funcs);
PtcJumpTable.WriteDynamicTable(jumpTable);
Logger.Info?.Print(LogClass.Ptc, $"{funcs.Count} translated functions loaded");
}
private static int GetInfosEntriesCount()
{
return (int)_infosStream.Length / InfoEntry.Stride;
}
private static InfoEntry ReadInfo(BinaryReader infosReader)
{
InfoEntry infoEntry = new InfoEntry();
infoEntry.Address = infosReader.ReadUInt64();
infoEntry.GuestSize = infosReader.ReadUInt64();
infoEntry.HighCq = infosReader.ReadBoolean();
infoEntry.Stubbed = infosReader.ReadBoolean();
infoEntry.CodeLen = infosReader.ReadInt32();
infoEntry.RelocEntriesCount = infosReader.ReadInt32();
return infoEntry;
}
private static void SkipCode(int codeLen)
{
_codesStream.Seek(codeLen, SeekOrigin.Current);
}
private static void SkipReloc(int relocEntriesCount)
{
_relocsStream.Seek(relocEntriesCount * RelocEntry.Stride, SeekOrigin.Current);
}
private static void SkipUnwindInfo(BinaryReader unwindInfosReader)
{
int pushEntriesLength = unwindInfosReader.ReadInt32();
_unwindInfosStream.Seek(pushEntriesLength * UnwindPushEntry.Stride + UnwindInfo.Stride, SeekOrigin.Current);
}
private static byte[] ReadCode(BinaryReader codesReader, int codeLen)
{
byte[] codeBuf = new byte[codeLen];
codesReader.Read(codeBuf, 0, codeLen);
return codeBuf;
}
private static RelocEntry[] GetRelocEntries(BinaryReader relocsReader, int relocEntriesCount)
{
RelocEntry[] relocEntries = new RelocEntry[relocEntriesCount];
for (int i = 0; i < relocEntriesCount; i++)
{
int position = relocsReader.ReadInt32();
int index = relocsReader.ReadInt32();
relocEntries[i] = new RelocEntry(position, index);
}
return relocEntries;
}
private static void PatchCode(Span<byte> code, RelocEntry[] relocEntries, IntPtr pageTablePointer, JumpTable jumpTable)
{
foreach (RelocEntry relocEntry in relocEntries)
{
ulong imm;
if (relocEntry.Index == PageTablePointerIndex)
{
imm = (ulong)pageTablePointer.ToInt64();
}
else if (relocEntry.Index == JumpPointerIndex)
{
imm = (ulong)jumpTable.JumpPointer.ToInt64();
}
else if (relocEntry.Index == DynamicPointerIndex)
{
imm = (ulong)jumpTable.DynamicPointer.ToInt64();
}
else if (Delegates.TryGetDelegateFuncPtrByIndex(relocEntry.Index, out IntPtr funcPtr))
{
imm = (ulong)funcPtr.ToInt64();
}
else
{
throw new Exception($"Unexpected reloc entry {relocEntry}.");
}
BinaryPrimitives.WriteUInt64LittleEndian(code.Slice(relocEntry.Position, 8), imm);
}
}
private static UnwindInfo ReadUnwindInfo(BinaryReader unwindInfosReader)
{
int pushEntriesLength = unwindInfosReader.ReadInt32();
UnwindPushEntry[] pushEntries = new UnwindPushEntry[pushEntriesLength];
for (int i = 0; i < pushEntriesLength; i++)
{
int pseudoOp = unwindInfosReader.ReadInt32();
int prologOffset = unwindInfosReader.ReadInt32();
int regIndex = unwindInfosReader.ReadInt32();
int stackOffsetOrAllocSize = unwindInfosReader.ReadInt32();
pushEntries[i] = new UnwindPushEntry((UnwindPseudoOp)pseudoOp, prologOffset, regIndex, stackOffsetOrAllocSize);
}
int prologueSize = unwindInfosReader.ReadInt32();
return new UnwindInfo(pushEntries, prologueSize);
}
private static TranslatedFunction FastTranslate(byte[] code, ulong guestSize, UnwindInfo unwindInfo, bool highCq)
{
CompiledFunction cFunc = new CompiledFunction(code, unwindInfo);
IntPtr codePtr = JitCache.Map(cFunc);
GuestFunction gFunc = Marshal.GetDelegateForFunctionPointer<GuestFunction>(codePtr);
TranslatedFunction tFunc = new TranslatedFunction(gFunc, guestSize, highCq);
return tFunc;
}
private static void UpdateInfo(InfoEntry infoEntry)
{
_infosStream.Seek(-InfoEntry.Stride, SeekOrigin.Current);
// WriteInfo.
_infosWriter.Write((ulong)infoEntry.Address);
_infosWriter.Write((ulong)infoEntry.GuestSize);
_infosWriter.Write((bool)infoEntry.HighCq);
_infosWriter.Write((bool)infoEntry.Stubbed);
_infosWriter.Write((int)infoEntry.CodeLen);
_infosWriter.Write((int)infoEntry.RelocEntriesCount);
}
private static void StubCode(int codeLen)
{
for (int i = 0; i < codeLen; i++)
{
_codesStream.WriteByte(FillingByte);
}
}
private static void StubReloc(int relocEntriesCount)
{
for (int i = 0; i < relocEntriesCount * RelocEntry.Stride; i++)
{
_relocsStream.WriteByte(FillingByte);
}
}
private static void StubUnwindInfo(BinaryReader unwindInfosReader)
{
int pushEntriesLength = unwindInfosReader.ReadInt32();
for (int i = 0; i < pushEntriesLength * UnwindPushEntry.Stride + UnwindInfo.Stride; i++)
{
_unwindInfosStream.WriteByte(FillingByte);
}
}
internal static void MakeAndSaveTranslations(ConcurrentDictionary<ulong, TranslatedFunction> funcs, IMemoryManager memory, JumpTable jumpTable)
{
var profiledFuncsToTranslate = PtcProfiler.GetProfiledFuncsToTranslate(funcs);
if (profiledFuncsToTranslate.Count == 0)
{
return;
}
_translateCount = 0;
ThreadPool.QueueUserWorkItem(TranslationLogger, profiledFuncsToTranslate.Count);
void TranslateFuncs()
{
while (profiledFuncsToTranslate.TryDequeue(out var item))
{
ulong address = item.address;
Debug.Assert(PtcProfiler.IsAddressInStaticCodeRange(address));
TranslatedFunction func = Translator.Translate(memory, jumpTable, address, item.mode, item.highCq);
bool isAddressUnique = funcs.TryAdd(address, func);
Debug.Assert(isAddressUnique, $"The address 0x{address:X16} is not unique.");
if (func.HighCq)
{
jumpTable.RegisterFunction(address, func);
}
Interlocked.Increment(ref _translateCount);
if (State != PtcState.Enabled)
{
break;
}
}
}
int maxDegreeOfParallelism = (Environment.ProcessorCount * 3) / 4;
List<Thread> threads = new List<Thread>();
for (int i = 0; i < maxDegreeOfParallelism; i++)
{
Thread thread = new Thread(TranslateFuncs);
thread.IsBackground = true;
threads.Add(thread);
}
threads.ForEach((thread) => thread.Start());
threads.ForEach((thread) => thread.Join());
threads.Clear();
Translator.ResetPools();
_loggerEvent.Set();
PtcJumpTable.Initialize(jumpTable);
PtcJumpTable.ReadJumpTable(jumpTable);
PtcJumpTable.ReadDynamicTable(jumpTable);
ThreadPool.QueueUserWorkItem(PreSave);
}
private static void TranslationLogger(object state)
{
const int refreshRate = 1; // Seconds.
int profiledFuncsToTranslateCount = (int)state;
do
{
Logger.Info?.Print(LogClass.Ptc, $"{_translateCount} of {profiledFuncsToTranslateCount} functions translated");
}
while (!_loggerEvent.WaitOne(refreshRate * 1000));
Logger.Info?.Print(LogClass.Ptc, $"{_translateCount} of {profiledFuncsToTranslateCount} functions translated");
}
internal static void WriteInfoCodeRelocUnwindInfo(ulong address, ulong guestSize, bool highCq, PtcInfo ptcInfo)
{
lock (_lock)
{
// WriteInfo.
_infosWriter.Write((ulong)address); // InfoEntry.Address
_infosWriter.Write((ulong)guestSize); // InfoEntry.GuestSize
_infosWriter.Write((bool)highCq); // InfoEntry.HighCq
_infosWriter.Write((bool)false); // InfoEntry.Stubbed
_infosWriter.Write((int)ptcInfo.CodeStream.Length); // InfoEntry.CodeLen
_infosWriter.Write((int)ptcInfo.RelocEntriesCount); // InfoEntry.RelocEntriesCount
// WriteCode.
ptcInfo.CodeStream.WriteTo(_codesStream);
// WriteReloc.
ptcInfo.RelocStream.WriteTo(_relocsStream);
// WriteUnwindInfo.
ptcInfo.UnwindInfoStream.WriteTo(_unwindInfosStream);
}
}
private static ulong GetFeatureInfo()
{
return (ulong)HardwareCapabilities.FeatureInfoEdx << 32 | (uint)HardwareCapabilities.FeatureInfoEcx;
}
private static uint GetOSPlatform()
{
uint osPlatform = 0u;
osPlatform |= (RuntimeInformation.IsOSPlatform(OSPlatform.FreeBSD) ? 1u : 0u) << 0;
osPlatform |= (RuntimeInformation.IsOSPlatform(OSPlatform.Linux) ? 1u : 0u) << 1;
osPlatform |= (RuntimeInformation.IsOSPlatform(OSPlatform.OSX) ? 1u : 0u) << 2;
osPlatform |= (RuntimeInformation.IsOSPlatform(OSPlatform.Windows) ? 1u : 0u) << 3;
return osPlatform;
}
private struct Header
{
public string Magic;
public uint CacheFileVersion;
public ulong FeatureInfo;
public uint OSPlatform;
public int InfosLen;
public int CodesLen;
public int RelocsLen;
public int UnwindInfosLen;
}
private struct InfoEntry
{
public const int Stride = 26; // Bytes.
public ulong Address;
public ulong GuestSize;
public bool HighCq;
public bool Stubbed;
public int CodeLen;
public int RelocEntriesCount;
}
private static void Enable()
{
State = PtcState.Enabled;
}
public static void Continue()
{
if (State == PtcState.Enabled)
{
State = PtcState.Continuing;
}
}
public static void Close()
{
if (State == PtcState.Enabled ||
State == PtcState.Continuing)
{
State = PtcState.Closing;
}
}
internal static void Disable()
{
State = PtcState.Disabled;
}
private static void Wait()
{
_waitEvent.WaitOne();
}
public static void Dispose()
{
if (!_disposed)
{
_disposed = true;
Wait();
_waitEvent.Dispose();
_infosWriter.Dispose();
_infosStream.Dispose();
_codesStream.Dispose();
_relocsStream.Dispose();
_unwindInfosStream.Dispose();
}
}
}
}